关闭属性是Python中文件对象(IO对象)的内置属性,可用于检查文件对象(即文件)是否关闭,这是只读属性,并返回布尔值(真) –如果文件已关闭,则为False –如果文件未关闭)。
语法:
file_object.closed
Parameter(s):
没有
返回值:
该方法的返回类型为<class'bool'>,它返回一个布尔值。
示例
# 带有示例的Python文件关闭属性 # 以各种模式打开文件 file1 = open("myfile1.txt", "w") file2 = open("myfile3.txt", "a") file3 = open("myfile4.txt", "wb") # 检查文件是否关闭 print("Before closing the files...") print("file1.closed: ", file1.closed) print("file2.closed: ", file2.closed) print("file3.closed: ", file3.closed) # 关闭文件 file1.close() file2.close() file3.close() # 检查文件是否关闭 print("After closing the files...") print("file1.closed: ", file1.closed) print("file2.closed: ", file2.closed) print("file3.closed: ", file3.closed)
输出结果
Before closing the files... file1.closed: False file2.closed: False file3.closed: False After closing the files... file1.closed: True file2.closed: True file3.closed: True